Home / 20,734.88-28,812.92-20,521.76

Finding the Fourth Proportional to 20,734.88, 28,812.92 and 20,521.76

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Solution

The fourth proportional to 20,734.88, 28,812.92 and 20,521.76 is: 28,516.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.88 : 28,812.92 = 20,521.76 : x
  2. Step 2: Convert to fraction form
    20,734.88/28,812.92 = 20,521.76/x
  3. Step 3: Cross multiply
    20,734.88x = 28,812.92 × 20,521.76
  4. Step 4: Simplify right side
    20,734.88x = 591,291,829.14
  5. Step 5: Solve for x
    x = 591,291,829.14/20,734.88
  6. Step 6: Final answer
    x = 28,516.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.